Adding Testimonial quotes:

In 'index.html' you just need to copy whole block of this HTML tag <div class=“testWrapCont”>… </div> and replicate it below. But please note that it has to stay withing this HTML tag <article class=“testWrap”> … </article>

Editing BXslider template:

This is an alternative slider as shown in this vento bxslider demo because in this bxslider one whole image spans width of the content.

Open up 'slider-bxslider.html'
See list item's tags inside <ul class=“bxslider”>…</ul> and put in relevant image source path to configure images.
Images will need to have width=“837” height=“350”

Other Notes:
Please open up 'index.html' and search for this comment 'below line is for DEMO site only…'
That commented block can be removed if you want to.